Electric cut-out.



T. E. MURRAY.

ELEUTRIO OUT-OUT. I APPLICATION FILED SEPT. 2,1908. I 913,755. Patented M21122, 1909.

3 SHEETS-SHEET 1.

T. E. MURRAY.

ELECTRIC CUT-OUT.

APPLICATION FILED SEPT. 2,1908.

3 SHEETS-SHEET 2.

Patented Mar. 2, 1909.

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T. E. MURRAY.

ELECTRIC CUT-OUT.

APPLICATION FILED SEPT. 2,1908.

Patented Mar. 2, 1909.

3 BHEBTSSHEET 3.

w w w. V E

witnesses 45 l? U1 \IITED.'STATES. PATENT onnron A i I 'rnoms MunnAY, N. A l

n'mc'r'mo 61 No. 913,755. P

speciflcation of Letters Patent. Application filed September 2, 190 Serial No. 451,440.

ia'b'ented'llareh a, 1909.

To all whom it may concern:

'Be it known that I, THoirAsE. MURRAY,

a citizen of the United'States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Electric Cuttion.

The invention is a cut-out embodying a base block and suitable removablev fuseplugs. The construction is such that circuit may be broken in'either the positive or negative conductor of a three w1re system, or in Outs, of which the following is a specificaboth, by simply reversing the position of the proper fuselug, or in the latter case, the positions 0 both Yfuselugs The .fuseplug -or fuse-plugs, whet er in position to 0 en or to close circuit, remain 1n the base book and are locked therein. The condit1on of the circuit, whether 0 on or closed,

is visually indicated by suitab e marks, and

the indication follows necessarily uponthe placing of the fuse-plugs in one position or the other. The sockets and receptacles into which the fuse plugs enter, and the connections therein, are com letely guarded by the plugs themselves whether the plugs he placed in one position or the other. The. plugs in either position prevent-removal of the cover, and m either position they "are;

looked in place. The connections of the conducting, wires are completely guarded by;

shields which are-also ocked in place. A

single devicelocks in'place the plugs, the

cover and all the shields, so that it is impossible tortamper with the electrical connections without removing said device and necessarily ma an exposure of that fact, through the breakage of a seal.

The invention consists in theconstruction more particularly pointed out in thecla-ims. In the accompanying drawings Fi re 1 is a plan view 0 when circuit is brokenin' the positive and negative conductors. Fig. 5,-is a cross section on the line 3 y, of Fig. 6in iaf t perspective view of one of the iuse plugs tiiiien from above; and Fig. 7 isra similarthe device, showing t ere-f movable fuse-plugs in position toclose ClIClllt.

.which is a u wardly projecting arms or sides. To the c p in socket 6 is secured by ascrew, one end of the' plus conductor 11 of a three wire system. Tolthe clip in socket 5, is secured bya screw, one end of the metalstrip 2. To the cli in socket 8, is secured by a screw, one end 0 the minus conductor 13. To the clip in socket 7 is secured by a screw, one end of the metal strip 4.

1 Between the pairs of sockets 5,16 and 7:, 8, is a receptacle 10 into which enters the end of the neutral conductor 12 which'is secured in place and electrically connectedto one end of stri 3 by screw 14. Also in the upper side 0 the base block are three transverse recesses 17, formed by walls 21, which walls do not extend to the level of the upper surview of ,one of the fuse-plugs taken from beeach of which sockets is a metal clip 9 having face of the base' block. Ente said base block and extending through said recesses are the three house wires 18, 19, 20, received between. pairs of metal plates 22. "Shid 3 plates are secured in place and are respectively'connected b screws tothe strips 2, 3,

4. A removable at cov'eri-n plate 23 rests upon the recess walls 21, so t at one ed e of said plate completes one bounding wall 0 the sockets 5 and 7 ,and receptacle 10, the upper surface'of said plate coming flush the upper surface of the base block. Also 1n the up r side'ofthe base block is *a recess 2.3

an a receptacle 24 in which are openings 25- for the rce tion'of the screws or bolts by which the 'd vice is secured. to a wall of a building or any other suitable support.

\ The two fuse-plugs A, B, 6 and 7, are

alike in construction. sThe case of each has an arched 11 per portion 26, on one side of are offsuch nslons and so placed as to ange 27. The bottom on itsprovided with a 31: The pro ections 28, 2-9

enter the sockets, 5,-6 01'7, 8, and establish 11 0 electrical contact withthe clips- 9 therein.

"lhe receptacles 10 and 24 are so placed and of such dimensions as that when the plugs are reversed, as hereinafter describe to break circuit, said rece tacles will receive the projections 28 an 29. -Withineach plug caseis disposed an arched fuse 32, of an suitable construction, having its terminaconnected'to the metal envelops 30 on projections28, 29.

Referring now to Fi s. 1 and 2, thefuseplugs A, B, are here s own with their pro ections 28, 29 inserted in the sockets 5, 6 and 7, 8, thus establishing circuit from the main'conductors 11, 13, through the strips 2, 4, to the house wires. The flange 27 of plug Athen extends over receptacle 10 and the flange 27 of completely 0 osing said receptacles.

In Figs. 4 and5, each fuse-plug is reversed in position, the projections 28 and 29 of plug A entering rece tacle 10, and the projectlons 28 and 29 of p ug B entering receptacle 24. The flange 27 of plug A then extends over sockets 5, 6and the flange 28 of plug B over sockets 7, 8, thus completelyclosing said recesses. In this position of the plugs A, B,

circuit is broken between the conductors 11, 13 and the strips 2, 3. r

In order to indicate visually whether circuits are closed or broken, I may mark on the cover 23, in any suitable way, the word On opposite the sockets 5, 6 and 7, 8, and the word Ofl' opposite the receptacles 10 and 24: and also mark or form in relief on the u per curved surfaces of the fuse plugs, doub e pointed arrows 33. When the fuse, lugs are in the position to close circuit, as s own in Fig. 1, the arrows33 point to the word On, and when in position to open circuit,

as in Fig. 4, the arrows point to the word OE.

The cover 23 is put in place before the fuse-plugs, so that said plugs over-lap a portion of said cover, as shown in Fig. 1, and so revent the removal of said cover from the ase block. Y The fuse plugs A, B, and cover 23 are locked in lace by the followin means. On

.- the base lock 1 are upwar y projectin lugs 34, 35, having openings. Through sai o 'enings and also through the openings 31 in t e fuse-plugs A, B, is passed a locking rod 36 having a head 37 at one end, and an opening at the'other end, which opening receives the shackle of any suitable seal 38, after the rod has been inserted, so that it is impossible to remove or alter the position of either plug, or toremove the cover 23 without'first breakin the seal and taking out the rod.

11' order to prevent access to the connections at the several junctions of the main and house conductors, I form, around the openings through which said conductors pass in,

plug B over receptacle 24, thus.

structed to fit in said 41. The shield 39 inc loses the main conductorsll, 12, 13, and the shields 40, 41, the i ii d l h 1 1 king d 1 00 e inpacebyt esinge oc ro areadydescribed. The shield 39 has an arm 42, which extends over the base block and between the fuse-plugs A, B, and is provided with an o ening near its end for the reception of said rod. The shields 40, 41 each have an arm 43 projecting from one side, which arms are also provided with o enings and are suitably laced outside the ugs 34, 35, to receive sai rod.

1 claim: 1. In an electric cut-out, a base having two sockets and circuit terminals therein, a removable fuse-plu structed to fit in saiil sockets, a receptacle in said base for said plug ends when said plug is removed from said sockets, and means on said plu for closingsaid sockets when said plug is. 's osed in said receptacle, and for closing sai receptacle when said plug is disposed in said sockets.

2. In an electric cut-out, a base having two sockets and circuit terminals therein, a

These three shields are all having its ends conremovable fuse-plu having its ends constructed to fit in sai sockets, a rece tacle in said base constructed to receive bot of said ends when said plug is removed from said sockets, and a flange on said plug: the said parts being constructed so that whensaid plug ends are respectively seated. in said sockets, said fian e shall close said rece tacle, and when said ends are seated in sa .re-

ceptacle, said flange shall close said sockets.

' 3. In an electric cut out, a base having two sockets and circuit terminals therein, a removable fuse-plug having a substantially semicircular case, a horizontal flange on one side of said case, projections on said case constructed to fit in said sockets, and a receptacle in said base for said projections when said plug is removed from said sockets: the said ange being of width sufiicient to cover said receptacle when said projections are in said sockets and to cover said sockets when said projections are in said receptacle.

4. In an electric cut-out, a base having two sockets and circuit terminals therein,a removable fuse-plu having its ends consockets, a rece tacle in said base for said plug ends when said plug is removed from sald sockets, and means constructed and operating to lock said plug in either position:

5. In an electric cut-out, a base having two sockets and circuit terminals therein, a removable fuse-plug having its ends constructed to fit in said sockets,a receptacle in said base for said plug ends when said plug is removed from said sockets, means on said said receptacle when said plug is disposed in said sockets, and means constructed and operating to lock said plug in either position.

6. In an electric cut-out, a base having two sockets and circuit terminals therein, a removable fuse plu having its ends constructed t fit in sald sockets, a receptacle 'in said base for said plug ends when, said plug is removed from said sockets, means on said plug for closing said sockets when said plug is dis osed in said receptacle and for closing sai rece tacle when said plug is disposed in said soc ets, and means on said plug and said base for visually indicating the make or break in circuit in accordance with the location of said plug in said sockets or in said receptacle. g

7. In an electric cut-out, a base having two sockets and circuit terminals therein,

circuit connections dis osed in said base a removable cover for c osing the portion of said base containing said circuit connections, a removable fuse-plug having its ends constructed to fit in said sockets and shouldered to overlap said cover, and means for locking said fuse plug in said base. i

8. In an electric cut-out, a base having two sockets and circuit terminals therein, circuit connections disposed in said base, a removable cover closing the portion of said base containing said circuit terminals, a removable fuse-plug having its ends constructed to fit in said sockets, areceptacle in said base for said plug ends when said plug is removed from said sockets, means on said plug for closing said sockets when said lug is dis osed in said receptacle, and for c osing said receptacle when said plug is dis osed in said sockets, the said plug being s ouldcred to overlap said cover when in either position, and means for locking said fuse-plug when in either position to said base.

9. A base block, two groups of circuit conductors entering openings in adjacent walls of said block, a detachable tubular shield inclosing each group of conductors and surroundmg said 0 'enings. and in contact with said block, and. a device for locking said shields to said block.

10. In an electric cut-out, a base block, a

removable fuselug therein, circuit coni ductors, remova le shields for pr0tectin said conductors at their entrances into sai base block, circuit connections in said block for said conductors, a removable cover for closing the portion of said base block containing said circuit connections, and a single device for locking said cover, fuse-plug and shields in place on said base block.

In testimony whereof I have afiixed my signature in presence of two witnesses. THOMAS E. MURRAY.

Witnesses: A. M. LAIDLAW,

MAY T. MCGARRY. 

